Plugged or inadequate weeping tile assists hydrostatic pressure to act on your foundation walls and under the basement floor.

Water penetrates into cracks, mortar joints and joint seams around the footing, walls and floor. Additionally, water must be drained from inside walls for foundations made of concrete block. This is done by drilling drainage holes in the bottom course.

A drainage board is installed to grade level on interior side of the basement wall. This directs water into a weeping tile and sump pump pit for elimination.


Interior Drainage Sump Pump Diagram

Diagram Legend

  1. Floor Joist
  2. Block Foundation Wall
  3. Footing
  4. Original Basement Floor
  5. Exterior Facade
  6. Grade
  7. Hydrostatic/Water Pressure
  8. Crack in Foundation Block
  9. Air Gap Drainage Board
  10. Patched Floor
  11. New Interior Weeping Tile
  12. Existing Weeping Tile
  13. Drain Holes in Base Blocks
  14. Clear 3/4” Stone
  15. Sump Pit (Pump Not Shown)

For more information on Waterproofing – Interior Drainage Systems, or for an expert diagnosis on your wet basement or foundation problem in Ontario, call us at 1-905-304-0739 or email us.